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Navini Networks, Inc. Ripwave Base Station I&C Guide
Part #40-00047-00 Rev D v1.0 199
February 28, 2003
Outdoor Cabinet Features & Considerations
General
Outdoor cabinets are designed to house electronic equipment, electrical equipment, and other
ancillary components (equipment) in outdoor environments where temperature, dirt, dust, oil,
water, and other contaminants may be a factor in the operation of the equipment.
Cabinet Construction
Frames, Doors & Mounting Rails
Outdoor cabinets may have any number of metallic and non-metallic (non-conductive) corrosion
resistant materials in their construction. Predominantly due to a combination of acceptable
overall cost, strength, weight, and corrosion resistance, .125 (1/8”) thick 5052 H32 aluminum or
other similar alloys are typically utilized in cabinet construction. Aluminum alloys provide
approximately the same stiffness as steel at about half the weight of steel, even though about
40% more aluminum is required to attain the same stiffness as steel.
Fabrication
Outdoor cabinets are typically constructed of a combination of welded, bolted, hinged, or
screwed panels attached or bonded to structural components. Construction methods used are
determined by a combination of price and function.
NEMA Rating
Outdoor cabinets normally utilize fabrication and assembly methods that will meet NEMA Type
3R or Type 4 rating requirements. The use of either NEMA Type 3R or Type 4 cabinets is
subject to the customer’s specific design requirements. Other types of NEMA rated enclosures
may be provided by a cabinet manufacturer to meet customer design requirements.
NEMA Type 4
NEMA Type 4 enclosures are rated for indoor or outdoor use to provide a degree of protection
against splashing water, windblown dust and rain, and hose directed water, and to remain
undamaged by the formation of ice on the enclosure. NEMA Type 4 enclosures do not provide
protection against submersion. Gaskets are typically utilized to provide weather tight seals for
hinged, bolted, and screwed panels on NEMA 4 rated enclosures.